Type of Submission
Poster
Keywords
vibrations, damping, automotive, hydraulic, bushing, flow, experiment, dynamic, isolation, compliance
Proposal
Hydraulic bushings are soft mechanical joint components which provide excellent vibration damping for a low-frequency band. These properties emerge from a tuned dynamic interaction between several features which either store or dissipate energy when the joint is flexed. In order to design and predict the dynamic properties of a hydraulic bushing, an understanding of the underlying physics governing each feature is needed. Typical feature models are based on many assumptions which are unlikely to be physically realistic under in situ loadings, so this study seeks to investigate the dynamic properties of hydraulic bushings’ flow passages under unsteady flow conditions.
In this project, a new measurement method is developed to subject flow passages to dynamic flow conditions, such as sinusoidal or transient flows, and measure the resulting characteristics. The apparatus is configured to test both controlled flow restrictions and isolated passages from production bushings. Analysis of the experimental results should facilitate improved modeling of hydraulic mounts and bushings. Some sample results are given, and future work is proposed.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Measurement Method for Dynamic Flow Characteristics of Hydraulic Bushing Features
Hydraulic bushings are soft mechanical joint components which provide excellent vibration damping for a low-frequency band. These properties emerge from a tuned dynamic interaction between several features which either store or dissipate energy when the joint is flexed. In order to design and predict the dynamic properties of a hydraulic bushing, an understanding of the underlying physics governing each feature is needed. Typical feature models are based on many assumptions which are unlikely to be physically realistic under in situ loadings, so this study seeks to investigate the dynamic properties of hydraulic bushings’ flow passages under unsteady flow conditions.
In this project, a new measurement method is developed to subject flow passages to dynamic flow conditions, such as sinusoidal or transient flows, and measure the resulting characteristics. The apparatus is configured to test both controlled flow restrictions and isolated passages from production bushings. Analysis of the experimental results should facilitate improved modeling of hydraulic mounts and bushings. Some sample results are given, and future work is proposed.
